Globio- 
5 Turner. 5 Fischer. 4 Hunter. | 5. Meckel. 5 Cuvier. 7 Hunter. |8 Burmeister.} 3 Jackson. 
402 DR MORRISON WATSON AND MR ALFRED H. YOUNG 
Toothed Whales. 
Grampus, | Delphinus. | Monodon. | Platanista. | Hyperoodon. se "y™- | . Catodon. Phocena. 
cephalus. 
—__ | | | fF es ees 
Sp. Svineval. | Sp. griseus. | Sp. tursio. [Sp.monoceros.|Sp. gangetica.| Sp. bidens. |Sp.cryptodon.} Sp. ? Sp. communis, 
4 Turner, 
5 Jackson. 4 Hunter. 
4 Murie. Sp. ? Sp. ? 3 Huxley. 
2 Gulliver. | 5 Hunter. 5 Turner. 4 Jackson. 
Pontoporia. |Sp. Rissoanus. | 
4 Murie. | | 
5 Jackson. 4 Crisp. 
Whalebone Whales. 
Balenoptera Sibbaldii. Physalus antiquorum. Baleenoptera rostrata. 
at least 4 Turner. 4 Murie. 5 Carte and Macalister. 
5 Hunter. 
4 Perrin. 
The diversity of statement brought out im the foregoing table regarding 
matters of fact is probably explicable on the supposition that different anatomists 
hold different views with regard to what ought to be considered a true gastric 
cavity, some regarding the duodenal dilatation so common among the cetacea 
as a true stomach, whilst others again look upon the third compartment 
described above as merely a communicating passage between the neighbouring 
cavities. 
Among the upholders of the latter view, we may mention the name of Dr | 
JAMES Muniz, who, in his elaborate monograph on Gilobiocephalus, adduces the 
following arguments in its favour. Dr Murre* says:—“ I look upon it (the cavity 
in question) only as a communicating canal, because of its diminutive capacity — 
and diameter; because it is not at all a free chamber, but, strictly speaking, — 
like the end of a bile duct, a tunnel burrowing its whole length betwixt the 
adjoining walls of II. and IV.; because of its smooth mucous membrane, 
showing few or no traces of digestion taking place therein; because the other 
four chambers agree with what obtains in Phoceena, Grampus, and Balenoptera, — 
and the two latter also offer an incipient structure of a similar kind, and corre-— 
sponding in situation; and, lastly, because I regard certain of the so-called 
stomachs of certain Cetaceans (Zyperoodon, for example, with six or seven) as 
* TI, p. 258, 
